Answer:
The following query is used to display TripName. Reservationld, FirstName. LastName and TotalCost of trip by adding the trip price plus other fees and multiplying the result by the number of persons which have number of persons >4.
Query:
SELECT ReservationlD, Trip.TripName. Customer.LastName. Customer.FirstName. (TripPrice+OtherFees) 'NumPersons as TotalCost FROM Reservation, Trip, Customer WHERE NumPersons>4 AND Reservation.TriplD=Trip.TriplD AND
Customer. CustomerNum=Reservation.CustomerNum:
Explanation:
- Select clause is used to retrieve data from specified database table or relation and returns the data in the form of table.
- ReservationID. Trip.TripName. Customer.LastName. Customer.FirstName are the column name of table.
- (TripPrice+OtherFees) 'NumPersons will calculate the total cost of the Trip and stored it into TotalCost column.
- As clause is used to give new name TotalCost to resultant column.
- FROM clause specifies one or more table from where records to be retrieved. o Reservation. Trip and Customer are the table name.
- WHERE clause is used in SQL query to retrieve only those records that satisfy the specified condition
Answer:
The right solution is "32 min".
Explanation:
The given values are:
Total delay,
= 3200 veh/min
Deterministic rate,
= 5 veh/min
For 1st arrival, time taken
= 20 minutes
Now,
To be clear the queue, the time take will be:
=
On substituting the values in the above formula, we get
=
=
=
Answer:
A
Explanation:
He should get a job in engineering to see what it's like to work in the field.
The total rate of energy emission is 2786.9 W.
<h3>Total Rate of Energy Emission</h3>
Radiation is a type of heat transfer where the heat energy is conveyed from photons or electromagnetic waves. The rate of energy emission can be calculated multiplying the Stefan–Boltzmann law (σ) by area (A). Therefore, you have:
Total Rate of Energy Emission (E)= σ, where:
σ = Stefan–Boltzmann constant =
A= area
T=temperature (K)
For solving this exercise, you should apply this formula. For your question:
σ = Stefan–Boltzmann constant =
A= 0.12 m²
T=527+273=800 K
Thus, the Total Rate of Energy Emission (E) will be:
E=σ
Read more about radiation heat transfer about:
brainly.com/question/16191304